1. 
   ZPU-4
   Series of quad-mount 14.5mm anti-aircraft guns [SU]
   Found op http://www.jedsite.info/index.html
   
   
2. 
   Zpu-4
   The ZPU-4 is a Soviet anti-aircraft defence comprised of four 14.5 mm calibre KPV heavy machine-guns mounted on a wheeled tractor. The ZPU-4 was introduced in 1949 and manually operated and optically sighted. The ZPU-4 fired the 14.5 mm calibre Soviet round at a rate of 600 rounds-per-minute from a ...
   Found op http://www.probertencyclopaedia.com/browse/FMZ.HTM
   
   

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